21000852380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{379}}^1\times {\mathrm{145819}}^1$

素因数の和:146226

約数の個数: 48

約数和(自身を含む): 46545744000

約数和(自身を除く): 25544891620

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 379, 380, 758, 1516, 1895, 3790, 7201, 7580, 14402, 28804, 36005, 72010, 144020, 145819, 291638, 583276, 729095, 1458190, 2770561, 2916380, 5541122, 11082244, 13852805, 27705610, 55265401, 55411220, 110530802, 221061604, 276327005, 552654010, 1050042619, 1105308020, 2100085238, 4200170476, 5250213095, 10500426190, 21000852380]

約数ペア:

[(1, 21000852380), (2, 10500426190), (4, 5250213095), (5, 4200170476), (10, 2100085238), (19, 1105308020), (20, 1050042619), (38, 552654010), (76, 276327005), (95, 221061604), (190, 110530802), (379, 55411220), (380, 55265401), (758, 27705610), (1516, 13852805), (1895, 11082244), (3790, 5541122), (7201, 2916380), (7580, 2770561), (14402, 1458190), (28804, 729095), (36005, 583276), (72010, 291638), (144020, 145819)]